My ducks pretty much go for anything they think they can get down their gobs! Mainly slugs, snails, ants, flies and the odd bumble bee (quite fizzy sounding as they go down). They attack my cats and any strays that wander into the garden
Even a day old duckling chased off my slightly curious cat by running up to him and biting his nose!!!
My drake got a bit over protective in the spring and attacked me while I was rescuing the duck that sank in the pond.
My fearless cat
And his terrifying opponent